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An attosecond is one quintillionth (10 to the power of minus 18) of a second. As of 2006, the smallest unit of time that was directly measured was on the order of 1 attosecond (10&minus
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Inside an atom are neutrons, gluons, protons and quarks. These particles are inside the atom are obviously smaller than the atom itself.
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Examples:-- picosecond.-- femtosecond.-- yoctosecond.-- attosecond.
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"Nano" is a prefix from the International Standard of Units. There are. 10 deciseconds in a second. 100 centiseconds. 1,000 milliseconds. 1,000,000 microseconds. 1,000,000,000
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